DTC B2439: Headlight LH Circuit; DTC B243A: Headlight RH Circuit [02/2019 - 12/2021]: Description
WARNING: This page is about a different car, the 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
The headlight ECU sub-assembly LH and headlight ECU sub-assembly RH internally boost the power supply voltage to ensure a constant supplied current for the Lo/Hi beam LED of their respective headlight.
By monitoring the LED power supply voltage, abnormal current and malfunctions can be detected.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from | Note |
|---|---|---|---|---|---|
| B2439 | Headlight LH Circuit | Detection condition:
Malfunction status:
Malfunction duration:
|
|
AFS | - |
| B243A | Headlight RH Circuit | Detection condition:
Malfunction status:
Malfunction duration:
|
|
AFS (Sub) | - |